US6903466B1 - Wind-power generator pod constituted by the body of an electricity generator - Google Patents

Wind-power generator pod constituted by the body of an electricity generator Download PDF

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Publication number
US6903466B1
US6903466B1 US09/653,408 US65340800A US6903466B1 US 6903466 B1 US6903466 B1 US 6903466B1 US 65340800 A US65340800 A US 65340800A US 6903466 B1 US6903466 B1 US 6903466B1
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US
United States
Prior art keywords
pod
generator
wind
fairing
stator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/653,408
Inventor
Jean-Charles Mercier
Stéphane Feron
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Alstom SA
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Alstom SA
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Filing date
Publication date
Application filed by Alstom SA filed Critical Alstom SA
Assigned to ALSTOM reassignment ALSTOM ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FERON, STEPHANE, MERCIER, JEAN-CHARLES
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Publication of US6903466B1 publication Critical patent/US6903466B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • H02K7/1838—Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/20—Heat transfer, e.g. cooling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Definitions

  • the invention relates to a pod for a wind-power generator, the pod being constituted by a rigid fairing in which at least one electricity generator is placed for the purpose of being coupled to at least one wind-driven propeller.
  • the fairing in a pod of that type is normally made of composite material or of metal and requires special adaptations to cool its internal elements such as the electricity generator. In particular, it is conventional to provide systems for ventilating the inside of the pod, thereby complicating its structure and increasing its weight.
  • the object of the invention is to remedy that drawback.
  • the rigid fairing of the pod is formed by the body of the generator in which a stator and a rotor are mounted.
  • This generator body can advantageously contain the gearing of the gearbox and the mechanism for steering the pod, thereby making the pod of the wind-power generator more compact. This simplifies installing the wind-power generator.
  • this arrangement makes it possible to use the fairing of the pod as a heat exchange surface for cooling the generator and the gearbox. Since the propeller is mounted at the rear of the pod, the wind which drives the propeller of the wind-power generator flows over the body of the generator, thereby improving heat exchange when the generator is in operation.
  • the rigid fairing of the pod to be surrounded by a tubular sleeve forming a substantially annular passage for air along the pod.
  • the fairing of the pod to be an interference fit on or to intimately contact the stator of the generator. This arrangement also reinforces the mechanical cohesion of the elements mounted inside the pod and reduces vibration phenomena.
  • the flow of hot air created by the rotation of the rotor is advantageously directed towards the inside surface of the fairing of the pod via lateral openings extending right through the stator.
  • the generator is coupled to the propeller via an epicyclic gearbox having inlet and outlet shafts that are on the same axis, thus enabling the propeller to be mounted directly on the outlet of the shaft of the generator.
  • This arrangement also contributes to reducing the number of gear wheels in the gearbox.
  • wind-power generator pod of the invention is described below in detail with reference to the sole FIGURE which shows it in highly diagrammatic manner as mounted at the top of a mast.
  • the highly diagrammatic figure shows part of a wind-power generator comprising a pod 1 mounted to swivel at the top of a vertical mast 2 .
  • the pod 1 is substantially cylindrical in shape extending along an axis of revolution A that is perpendicular to the mast 2 .
  • An electricity generator constituted by a stator 3 and a rotor 4 (shown in part in the figure above the axis A) is mounted inside the pod 1 and is coupled to a least one propeller 5 via an epicyclic gearbox (stepdown gearbox) 6 .
  • the rigid outer fairing 7 of the pod 1 is formed by the metal body of the generator.
  • the outer fairing 7 is surrounded coaxially by a tubular sleeve 8 which forms an annular passage 12 for the wind V driving the propeller 5 .
  • the end of the sleeve 8 facing the wind V is flared in this case and the propeller 5 is mounted at the back of the pod 1 relative to the wind direction so as to maintain a degree of stability in the flow of air along the passage 12 formed by the sleeve 8 .
  • the gearbox 6 is mounted inside the fairing 7 and the propeller 5 is fixed directly to the outlet of the shaft, thereby simplifying mechanical assembly and in particular simplifying coupling between the generator and the gearbox.
  • the sleeve 8 can be held at a distance from the fairing 7 by means of supporting cross-members 9 .
  • a system 10 for steering the pod 1 is shown as being integrated in the top of the mast 2 , but can be located inside the pod 1 which would contribute to simplifying installation of the wind-power generator.
  • the fairing 7 is advantageously an interference fit on or intimately contacts the stator 3 , and lateral openings 11 pass through the stator 3 so as to direct the hot air created by rotation of the rotor 4 against the fairing 7 so that the hot air is cooled by flowing along the fairing 7 which acts as a heat exchanger with the air on the outside of the pod 1 .

Abstract

The pod of wind-powered generator is constituted by a rigid fairing in which at least one electricity generator for coupling to at least one wind-driven propeller is disposed. The rigid fairing of the pod is formed by the body of the generator in which there are mounted a stator and a rotor, thereby simplifying the structure of the pod.

Description

The invention relates to a pod for a wind-power generator, the pod being constituted by a rigid fairing in which at least one electricity generator is placed for the purpose of being coupled to at least one wind-driven propeller.
BACKGROUND OF THE INVENTION
The fairing in a pod of that type is normally made of composite material or of metal and requires special adaptations to cool its internal elements such as the electricity generator. In particular, it is conventional to provide systems for ventilating the inside of the pod, thereby complicating its structure and increasing its weight.
OBJECT AND SUMMARY OF THE INVENTION
The object of the invention is to remedy that drawback.
According to the invention, the rigid fairing of the pod is formed by the body of the generator in which a stator and a rotor are mounted. This generator body can advantageously contain the gearing of the gearbox and the mechanism for steering the pod, thereby making the pod of the wind-power generator more compact. This simplifies installing the wind-power generator. In addition, this arrangement makes it possible to use the fairing of the pod as a heat exchange surface for cooling the generator and the gearbox. Since the propeller is mounted at the rear of the pod, the wind which drives the propeller of the wind-power generator flows over the body of the generator, thereby improving heat exchange when the generator is in operation.
To maintain laminar flow over the entire length of the pod for the wind driving the propeller, provision can advantageously be made for the rigid fairing of the pod to be surrounded by a tubular sleeve forming a substantially annular passage for air along the pod.
To further increase heat exchange between the stator and the fairing of the pod, provision can be made for the fairing of the pod to be an interference fit on or to intimately contact the stator of the generator. This arrangement also reinforces the mechanical cohesion of the elements mounted inside the pod and reduces vibration phenomena.
The flow of hot air created by the rotation of the rotor is advantageously directed towards the inside surface of the fairing of the pod via lateral openings extending right through the stator.
In a particular embodiment of the pod of the invention, the generator is coupled to the propeller via an epicyclic gearbox having inlet and outlet shafts that are on the same axis, thus enabling the propeller to be mounted directly on the outlet of the shaft of the generator. This arrangement also contributes to reducing the number of gear wheels in the gearbox.
BRIEF DESCRIPTION OF THE DRAWING
The wind-power generator pod of the invention is described below in detail with reference to the sole FIGURE which shows it in highly diagrammatic manner as mounted at the top of a mast.
 MORE DETAILED DESCRIPTION
The highly diagrammatic figure shows part of a wind-power generator comprising a pod 1 mounted to swivel at the top of a vertical mast 2.
As can be seen in the figure, the pod 1 is substantially cylindrical in shape extending along an axis of revolution A that is perpendicular to the mast 2.
An electricity generator constituted by a stator 3 and a rotor 4 (shown in part in the figure above the axis A) is mounted inside the pod 1 and is coupled to a least one propeller 5 via an epicyclic gearbox (stepdown gearbox) 6.
The rigid outer fairing 7 of the pod 1 is formed by the metal body of the generator. The outer fairing 7 is surrounded coaxially by a tubular sleeve 8 which forms an annular passage 12 for the wind V driving the propeller 5. The end of the sleeve 8 facing the wind V is flared in this case and the propeller 5 is mounted at the back of the pod 1 relative to the wind direction so as to maintain a degree of stability in the flow of air along the passage 12 formed by the sleeve 8. The gearbox 6 is mounted inside the fairing 7 and the propeller 5 is fixed directly to the outlet of the shaft, thereby simplifying mechanical assembly and in particular simplifying coupling between the generator and the gearbox.
The sleeve 8 can be held at a distance from the fairing 7 by means of supporting cross-members 9.
A system 10 for steering the pod 1 is shown as being integrated in the top of the mast 2, but can be located inside the pod 1 which would contribute to simplifying installation of the wind-power generator.
The fairing 7 is advantageously an interference fit on or intimately contacts the stator 3, and lateral openings 11 pass through the stator 3 so as to direct the hot air created by rotation of the rotor 4 against the fairing 7 so that the hot air is cooled by flowing along the fairing 7 which acts as a heat exchanger with the air on the outside of the pod 1.

Claims (6)

1. A wind-power generator pod comprising:
a rigid fairing in which at least one electricity generator is disposed for coupling to at least one wind-driven propeller, wherein the rigid fairing constitutes a body of the generator in which a stator and a rotor are mounted, such that the stator contacts the fairing, and
wherein lateral openings extend through the stator: the rigid fairing is surrounded by a tubular sleeve forming a substantially annular air passage between the rigid fairing and the tubular sleeve; the tubular sleeve has an end portion which is flared outwardly; and the end portion which is flared outwardly is disposed towards an end of the fairing which is opposite the wind-driven propeller.
2. The pod according to claim 1, in which the rigid fairing is attached to the stator of the generator via an interference fit.
3. The pod according to claim 1, in which the generator is coupled to the wind propeller via an epicyclic gearbox.
4. The pod according to claim 3, in which the gearbox is mounted inside the rigid fairing.
5. A wind-powered generator comprising a pod according to claim 1 and mounted to swivel at the end of a mast.
6. The pod according to claim 1, wherein the tubular sleeve is shorter in length than the fairing.
US09/653,408 1999-09-01 2000-08-31 Wind-power generator pod constituted by the body of an electricity generator Expired - Fee Related US6903466B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9910974A FR2797921B1 (en) 1999-09-01 1999-09-01 WIND TURBINE PLATFORM CONSISTING OF THE CARCASS OF AN ELECTRIC GENERATOR

Publications (1)

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US6903466B1 true US6903466B1 (en) 2005-06-07

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EP (1) EP1081376B1 (en)
DE (1) DE60021492T2 (en)
DK (1) DK1081376T3 (en)
ES (1) ES2244397T3 (en)
FR (1) FR2797921B1 (en)
PT (1) PT1081376E (en)

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